Pan/Tilt Camera Head with Control Interface
Crestron
CPC-CAMI
Positional Feedback Signals
Positional feedback signals are generated by the networked CPC-CAMI and input to
the rest of the program. Four analog positional feedback signals, TILT_POS,
PAN_POS, FOC_POS, and ZOOM_POS, represent the current pan/tilt axis position
and focus/zoom lens setting. The CPC-CAMI converts positional potentiometer
wiper voltages to analog positional feedback signals. For example, an analog level of
0% on TILT_POS indicates that the pan/tilt is at its down limit (assuming the limit
stops are properly adjusted to allow full travel). An analog level of 100% on
TILT_POS indicates that the pan/tilt is at its up limit.
Drive Signals
Drive signals are generated from the SIMPL Windows program and output to the
CPC-CAMI. There are two types of drive signals, position and rate. Each type is
comprised of four analog programmed outputs for the CPC-CAMI.
Four position drive signals, TILT_SET, PAN_SET, FOC_SET, and ZOOM_SET,
are used to instruct the CPC-CAMI to drive the camera to a preset position. Anytime
the analog level on one of these drive signals change, the CPC-CAMI adjusts the
corresponding pan/tilt axis and focus/zoom lensposition until the feedback matches
the level at the programmed output.
Four rate drive signals, TILT_RATE, PAN_RATE, FOC_RATE, and ZOOM-
RATE, are used to drive the pan/tilt axis and focus/zoom lens position without the
use of presets. For the pan/tilt axis and focus/zoom lens position to remain
motionless, the analog level at each of these programmed outputs should be 50%. If
one of these levels rises higher than 50%, the corresponding pan/tilt axis or
focus/zoom lens position is adjusted in the positive direction until the level returns to
50%. If the level drops below 50%, the corresponding pan/tilt axis or focus/zoom
lens position is adjusted in the negative direction until the level returns to 50%.
Additional Symbol Features
There are a few lines of the CPC-CAMI symbol that are not implemented in the
sample provided. A brief description of each is provided below for those that wish to
use the features in programming a system.
IRIS
There are two signals requiring iris. One is analog and sets the IRIS analog out. The
second is a digital (join #1) switch that opens or closes iris control contacts. This
switch is similar to relay contacts and on most lenses it is used for AUTO/MANUAL
iris control (assuming the lens is capable). The outcome of an open or closed contact
is lens dependent. For example, when contacts are open, a lens went into
IRIS_AUTO mode. When the contacts closed, the lens went into IRIS_MANUAL
mode. This switch can be used as a general purpose solid-state relay single-pole
single-throw. Its use is purely subjective.
MODE SET
This feature is used for debugging and applies only to Canon KTS or Fujinon MD,
BMD series type lenses which have input to switch between rate/position mode. It
does not affect any other lenses. This signal is a digital (join #3) switch that affects
IRIS/FOCUS/ZOOM.
SPEED LIMIT
This feature permits the scaling of the pan/tilt speed. Speed limit does not affect lens
action.
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Pan/Tilt Camera Head with Control Interface: CPC-CAMI
Operations Guide - DOC. 5726A
